Check-valve.



E. A. KERSTHN,

CHECK VALVE.

I APPLICATION FILED $158.14, 1918. 1,285,220..

Patented Nov. 19, 1918.

ERNEST A. KERSTEIN, or UNION, NEW JERSEY," nssrenon 'ro AMERICAN METER COMPANY, on NEW YORK, N. Y., A CORPORATION OF DEL WARE;

CHECK-VALVE. i

To all whomit may concern:

Be it known that I, ERNEST ALKERSTEIN, a citizen of the United States, residing at Union, in the county of Hudson and State of New J ersey,have invented -new,and useful Improvements in Check-Valves, of which the following is a specification.

The present invention relates to check valves for use in connection with systems for delivering illuminating gas and other fluids of like character; and it proposes, briefly, an improved device of the general class indicated, which is designed to prevent back pressure in the piping comprised in such systems and which is applicable primarily, though not restrictedly, as an adjunctto, or attachment for, a standard gas meter, to avoid injury to. the meter parts due to their backward movement under the pressure of the gas.

According to the invention, there is provided Within the receiving chamber, which contains the usual valve gear, a smaller cas ing or chamber wherein is housed a supplemental valve. This supplemental valve normally rests on its seat, and the gas, after having been measured, causes said valve to lift, enters said housing through the valve opening and then passes therefrom to the outlet pipe, instead of flowing directly to the latter in the ordinary way. Conversely, if the. pressure in the outletlpipe exceeds that in the inlet, the supplemental valvewill be forced against its seat and communication between the valve housing and the receiving chamber will be interrupted, with the result that reverse movement of the measuring and indicating. mechanism is completely prevented. I g

An embodiment of the invention 15111115- trated in the accompanying drawing, where- Specification of Letters Patent.

Application filed February 14, 1918.. Serial No. 217,218.

' PatentedNov. 19, 191 s.

theinterior of the meter is divided by the horizontal partition pl'ateor table 7 and 8 and .9 the inlet and outlet pipes; themeter here represented being of standard construe tion, though any othersuitable or preferred form of meter may be employed. The-upper chamber 5 ordinarily constitutes'the receiving chamber and contains the usual valve gear and indicating mechanisimthe latter being omitted from the present showmg as forming no part of the invention, while the lower chamber 6 contains the usual .bellows mechanism, illustration of which'is likewise omitted for the same reason. In the present construction, however, the gaschamber is constituted by asubstantially-pentagonal inclosure is provided within the chamber 5 and 'is supplied with gas by a horizontal conduit 11,:disposed longitudinally and centrally of the table 7 and having its top wall formed by said table. The conduit extends from end to end of the table and is provided with an outlet opening 12 between its ends, this opening being located in the top wall of the conduit and so disposed as to discharge the gas into the gas chamber or case 10; the gas flowing through the conduit being deflected through said opening by an inclined partition plate 13. The usual open,- ing at the far end of the conduit communicating with the outlet pipe 9 is blocked by a closure plate 14:, and the gas, instead of flowing into said pipe through that 0pening in the ordinary way,-after having'been measured, reaches the outlet pipe 9 in an entirely different manner, as explained later. The valve gear, generally indicated by reference character 15, is arranged within the 'gas chamber 10,-but is only artially illustrated, thetwo slide valves of which only or caselO, which one appears) acting in the usual manner to control the corresponding ports leading to and from the measuring mechanism and, hence, the subsequent passage of the gas through the two converging channels 16.

table 7 at opposite sides of the conduit 11, and open'at their delivery ends into said conduit a slight distance from the closure plate 14.

These channels 16 are disposed beneath the Ell,

all)

naeaeeo ml The supplemental valve device, which, as,

conduit and having its edge turned con-U tinuously upward so as to provide an annular valve seat 19. The passage of the gas through the opening 18 is controlled by means of 'the icheck valve 20, which, in the construction illustrated, takes the form of a disk or plate, pivoted to one end of a lever 21. (The said lever is fulcruined centrally in an upstanding bracket 22, suitably mountedjinfthe housing, and its other arm carries a counterbalance weight, 23, the arrange ment being such that the valve rests upon its seat when the pressure on both sides thereof is the same, which is the, case when no. flow takes place, but will be raised from said seat upon a yery slight increase in pressure on the inlet side in order to permit the gas, after having passed. from the channels 16 intothe conduit, vto enter the housing and escape therefrom into the outlet pipe 9 by way'ot an opening 24; provided in that portion of the adjacent side wall of the meter which ,is connnon tothe housing 17 and said outlet pipe .9. a

The normal movement of the gas will be apparent from the foregoing, and hence, requires no extended explanatioinit being considered sufficient to state that, on entering the conduit 11 from the inlet pipe 8, the gas flows through "said conduit until it reaches the opening 12, whereupon it passes into the gas chamber 10; then through the ports controlled by the valve gear to the bellows mechanism where it is measured in theusualway and thenpasses through the proper ports to the channels 16.; thence back into the conduit 11 where it passes through the opening .18, raising the valve 20 and" flowing into the valve housing '17, from which it finally, escapes into the outlet pipe 9 through the opening all as. in vdicated-by the arrows in Fig. 1. If, however, the pressure on the outlet side should increase, from any cause, to a point Where it becomes equal to or exceeds that on the inlet sident the meter, then the gas willbe forced backward through said pipe, and through the opening 24 into the valvehousing; but instead oi being permitted to es cape-therefrom and reenter the measuring chamber, the pressure of the gas in said housing acts directly upon the check valve 2t) and iorces it tightly its seat 19,

thereby shutting off communication between the housing and the conduit until the pressure in the outlet pipe again falls below that on the inlet side,-whereupon the valve automatically opens under the influence of the pressure on the inlet side.

While the invention has been shown and described as applied to a standard or other gas meter, it will be understood, as previously stated, that no limitation to such use, non in fact, even to a fluid meter, is contemplated, excepting in so far as implied by the terms 01": "the appended claims, since the invention is capable of being installed and utilized in a line of pipe or in the outlet pipe of the meter to prevent back pres sure.

I claim as my invention 1. A fluid deliver system of the character specified comprising a. conduit through which the fluid passes, said conduit having an outlet and a partition 'thereacross inadvance of the said outlet, the said outlet opening into means having communication with the conduit in advance of the partition, and an outlet inclosure also, communicating with said conduit in advance of the partition vand havin a valve therein operating to close communication between a said linclosure and the conduit when the pressure in "the inclosure is the same as or exceeds that in the a conduit.

2. In a fluid delivery system, the combination of a conduit through which the fluid is to pass, said conduit having an interme diate partition thereacross forming an ebstruction to the passage of the fiuicl,a houscoinniunicating with the conduit at opposite sides of said partition whereby the fluid is caused to pass through said housing :on reaching the partition, and a valve in said housing adjacent to the outlet member oi": the conduit and operable automatically to close the inlet ,port by the rise of pressure in the conduiton the .outletside of the partition.

3. in a fluid meter, a receiving chamber, a fluid supply conduit in port coinmunica- .tion with the chamber, the fluid supply conduit having inlet and outlet pipe members a partition within and'extending across the supply conduit for deflecting the ,flnidirom the conduit through the port in communication with the receiving chamber, a housing disposed within said chamber and has ing an. outlet port opening; into the outlet pipe member, the housing being isolated from communication with the said chamber and having an inlet port communicating with the supply conduit in advance of the partition, means for conducting fluid from said receiving chamber to the supply con- 100 mg haymg separate inlet and outlet ports 7 duit in advance of the partition to effect a In testimony whereof I have he 'eunto set flow of the fluid into the housing, and a my hand in presence of two subsonbing witvalve in said housing automatically opernesses.

able to close the inlet port of the housing ERNEST A. KERSTEIN. 5 when the pressure of the fluid in the outlet Witnesses:

pipe member is the same as or exceeds that JOHN Gmmox, Jr.,

in the supply conduit. FRANK Pmmmwon.

Copies of this patent may be obtained for five cents eeoh, by addressingthe Commissioner of intents,

Washington, D. 0. 

